Equalizing apparatus.



PATENTED MAY 7, 1907.

No. .853;081. I

d. d. GRIMES. EQUALIZING APPARATUS.

APPLICATION I'ILED SEPT. 14, 1906.

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PATBNTED MAY 7, 1907.

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APPLICATION IILBD SEPT. 14, 1906.

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CURTIS C. GRIMES,

PATENT @FFICE.

\ OF HASKELL, INDIAN TERRITORY.

EQUALIZING APPARATUS- 1 Specification of Letters Patent.

Patented May '7, 1907.

Application filed September 14, 1906. Serial No. 834,636.

T0 on whom, it may concern:

Be it known that I, Owens 0. GRIMEs, a citizen of the United States, anda resident of Haskell, in the Cherokee Nation and Indian I Territory,have invented certain new and l useful Improvements in Equalizing Appalratus, of which the following is a specification.

This invention is an improvement in equalizers comprising in connectionwith the platform and the frame in connection with which said platformis movable, means whereby the platform may be retained in the same planeor planes parallel to its normal l position when depressed at any pointthroughout its surface; and the'invention consists in certain novelconstructions and combinations of parts as will be hereinafter describedand claimed.

In the drawings Figure 1 is a vertical longitudinal section and Fig. 2is a horizontal section on about the line 22 of Fig. 1 of an apparatusembodying my invention. Fig. 3 is a vertical cross-section on about theline 33 of Fig. 1. Fig. 4 is a detail vertical sec tion somewhatenlarged showing one end of the apparatus, and Fig. 5 is a detailperspective view partly in section.

I have shown my invention as embodied in a bedstead and in thisconstruction the bedstead A forms what may for convenience of referencebe termed the main frame and the spring mattress frame B constituteswhat may be termed the platform which is movable relative to the saidmain frame, but it l I l will be understood that my invention is capableof embodiment in various constructions and can be employed to advantagein supporting car beds, wagon beds, in buffers, and the like withoutdeparting from any of the principles of the invention.

As shown the platform B is movable relative to the main frame A and isso connected with the main frame that when any portion of the platformis depressed, all of the other portions will be correspondinglydepressed so that the platform will be maintained in position parallelto its normal position at all times.

Levers C are arranged adjacent to the op- I posite ends of the platformB and are pivoted between their ends and preferably a short distancebelow their upper ends to the platform, the said levers having theupwardly projecting arms C and the downwardly pro- I jecting arms C andbeing pivoted preferably by means of cross-shafts C which extend belowthe platform B from side to side thereof and are j ournaled at theirends in bearings B provided on the under side of the platform B at theopposite sides thereof. These shafts C have at their ends enlargedsections or portions 0* from which project at an angle to the verticaland toward the ends of the main frame crank arms D which form with thelinks E connections between the levers C and the main frame. It shouldbe understood that the levers C comprise in the con struction shown theshafts C with their enlarged portions C and the arms C and C as well asthe crank arms D which being rigid with the arms C and C operate asparts of the same lever in securing the equalizing results sought by myinvention.

The links E are pivoted at their lower ends to the outer ends of thecrank arms D and at their upper ends to brackets F which are bent toengage with the end rails A of the main frame as shown in Figs. 1, 4 and5 of the drawings. A spring connection G extends between and connectsthe lower ends of the depending arms C of the opposite levers and givesthe necessary resilience and spring to the platform B when weight isapplied thereon and also operates to return the said platform after thesame has been forced from its normal position and the force released.

Rods or connections H connect the opposite levers and are secured at oneend to the upper arm of one lever and to the lower arm of the other oropposite lever crossing each other midway between the levers and beingsecured to the said levers at points equidis tant from the pivotal aXisC These connections H transmit the motions of one lever to the other sothat if one end of the platform be depressed the opposite end will becorrespondingly depressed by reason of the said connections H and theoperation of the crank arms and links connecting the same with the mainframe.

The construction is simple, easily operated and adapted for thedifferent purposes for which it may be used and efficiently serves thepurpose for which it is designed.

What I claim is 1. An equalizing apparatus substantially as hereindescribed. comprising a main frame, a platform movable relativelythereto, levers pivoted to the platform and having arms projecting onopposite sides of its pivot and IIO ' the lower arms the same with andthe lower arms of the opposite levers, a spring connection betweensubstantially as set forth. of tlie opposite levers, and 4. Thecombination of the main frame, the connections extending between theupper platform, the levers having pivoted shafts arms of each of thelevers and the lower arms l extending transversely and journaled at ofthe respective opposite levers, substantheir ends to the platform andforming pivtially as set forth. ots for the levers, said levers havingarms 2. The combination of the main frame, the l above and below theircross-shafts, crank cranks and links connecting the mam frame,

platform movable relative thereto, levers arms projecting from thecross-shafts, links pivoted to the platform and having upper connectingsaid crank arms with the main and lower arms, springs connecting thelower frame, a spring between the lower arms of arms of the upperlevers, connections. bethe opposite levers, and equalizing connectweensaid levers and extending between the tions between the opposite levers,substanupper arm of each lever and the lower arm of ti ally as setforth. the opposite lever, and connections between 5. The combination ofthe main frame, a the levers and the main frame, substantially platformmovable relatively thereto, the opas set forth. posite levers pivoted tothe platform and 3. The combination of the main frame, the havingprojecting crank arms, and means platform movable relatively thereto,levers connecting the same with themain frame, pivoted to the platformand having arms and equalizing connections between the opabove and belowtheir pivots and crank arms, links pivoted at one end to the crankposite levers whereby to enforce a common arms, brackets to which theother ends of the said links are pivoted, said brackets being connectedwith the main frame, a spring exis depressed at any point, substantiallyas set forth.

CURTIS C. GRIMES. Witnesses:

SoLoN C. KEMON, PERRY B. TURPIN.

tending between the lower arms of the oppo. site levers, and connectionsextending between the upper arms of each of the levers movement of saidlevers when the platform

